Fixed opcode description

Replace ZEND_ASSIGN_ADD (and others) by ZEND_ASSIGN_OP, ZEND_ASSIGN_DIM_OP, ZEND_ASSGIN_OBJ_OP and ZEND_ASSIGN_STATIC_PROP_OP

Improve zend_binary_assign_op helpers.
Reorder opcode numbers to make ADD-POW and ASSIGN_ADD-ASSIGN_POW opcodes sequencional.

Optimization of INC/DEC helpers

Reduce overhead of delayed early binding

Register class before fetching parent

We want the class declaration to be available while compiling the
parent class.

Don't specialize "cold" handlers

Removed useless specialization. Specialized handlers called not specialized helpers.

Implement spread operator in arrays

RFC: https://wiki.php.net/rfc/spread_operator_for_array

Closes GH-3640.

Avoid useless code duplication, because of unused specialization

Adios, yearly copyright ranges

Implement ??= operator

RFC: https://wiki.php.net/rfc/null_coalesce_equal_operator

$a ??= $b is $a ?? ($a = $b), with the difference that $a is only
evaluated once, to the degree

Implement ??= operator

RFC: https://wiki.php.net/rfc/null_coalesce_equal_operator

$a ??= $b is $a ?? ($a = $b), with the difference that $a is only
evaluated once, to the degree that this is possible. In particular
in $a[foo()] ?? $b function foo() is only ever called once.
However, the variable access themselves will be reevaluated.

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Implement typed properties

RFC: https://wiki.php.net/rfc/typed_properties_v2

This is a squash of PR #3734, which is a squash of PR #3313.

Co-authored-by: Bob Weinand <bobwe

Implement typed properties

RFC: https://wiki.php.net/rfc/typed_properties_v2

This is a squash of PR #3734, which is a squash of PR #3313.

Co-authored-by: Bob Weinand <bobwei9@hotmail.com>
Co-authored-by: Joe Watkins <krakjoe@php.net>
Co-authored-by: Dmitry Stogov <dmitry@zend.com>

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Implement ZEND_ARRAY_KEY_EXISTS opcode to speed up array_key_exists()

Update email addresses. We're still @Zend, but future proofing it...

Keep information about unresolved interfaces in zend_class_entry->interface_names.
Move interface implementation code into ZEND_DECLARE_*CLASS opcodes.
Remove ZEND_ADD_INTERFACE and ZEND_VER

Keep information about unresolved interfaces in zend_class_entry->interface_names.
Move interface implementation code into ZEND_DECLARE_*CLASS opcodes.
Remove ZEND_ADD_INTERFACE and ZEND_VERIFY_ABSTRACT_CLASS opcodes.

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Replace zend_class_entry->traits by persistent zend_class_entry->trait_names.
Move trait binding code into ZEND_DECLARE_*CLASS opcodes.
Remove ZEND_ADD_TRIAIT and ZEND_BIND_TRAITS opcodes.

Don't use second operand of BIND_STATIC instruction.

Fixed bug #76752 (Crash in ZEND_COALESCE_SPEC_TMP_HANDLER - assertion in _get_zval_ptr_tmp failed).

Encode parent class name as IS_CONST operand in DECLARE_INHERITED_CLASS and DECLARE_ANON_INHERITED_CLASS opcodes (eliminate FETCH_CLAS
S opcode).

Inline few small opcode handlers into hybrid executor

Avoid live range references in opcodes

Don't store the live range of the freed variable for FREE_ON_RETURN
frees, instead look it up at runtime. As this is an extremely
unlikely code

Avoid live range references in opcodes

Don't store the live range of the freed variable for FREE_ON_RETURN
frees, instead look it up at runtime. As this is an extremely
unlikely codepath (in particular, it requires a loop variable with
a throwing destructor), saving the runtime lookup of the live range
is not worth the extra complexity this adds everywhere else.

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fix unknown opcode overflow error

Moved "zval.u2.cache_slot" into free room of "zend_op"

Avoid repeatable ARG_SHOULD_BE_SENT_BY_REF() checks in FETCH_*FUNC_ARG and following SEND_VAR_EX. Perform the check once in a new CHECK_FUNC_ARG opcode and reuse in the following FETCH_*FUNC_ARG and

Avoid repeatable ARG_SHOULD_BE_SENT_BY_REF() checks in FETCH_*FUNC_ARG and following SEND_VAR_EX. Perform the check once in a new CHECK_FUNC_ARG opcode and reuse in the following FETCH_*FUNC_ARG and SEND_FUNC_ARG (SEND_VAR_EX replacement).

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